Drug compounding is the long-standing pharmacy practice of mixing, combining, or altering ingredients to create drugs tailored to individual patient needs. Compounding is as old as the practice of pharmacy and close to the heart of the modern profession. Indeed, the mortar and pestle – an iconic emblem of compounding – have long been the prevailing symbol of pharmacy. Prior to the emergence of commercially available drug products, the practice of compounding was the practice of pharmacy – to create medicines, early pharmacists inevitably needed to extract and compound natural vegetable, animal, and mineral substances. In one impressive example of successful early compounding, God commanded Moses to “compoundeth” a holy anointing oil of myrrh, cinnamon, cassia, olive oil, and sweet calamus. Not generally one to shrink from a challenge, Moses followed God’s recipe and used his compounded oil to anoint the vessels of the Tabernacle and High Priest.